MOVPE growth of InAs quantum dots for mid-IR applications

Xiao Hong Tang*, Zong You Yin, An Yan Du, Jing Hua Zhao, S. Deny

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

InAs quantum dots (QDs) grown on InxGa1-xAs/InP matrix by low pressure metal organic vapor phase epitaxy (LP-MOVPE) in nitrogen ambient were studied. Formation of the InAs QDs with different growth conditions was investigated. To improve the dot size uniformity, a two-step growth method was used and investigated. It is found that morphology of the InAs QDs formed on such InxGa1-xAs/InP matrix is very sensitive to the growth conditions. InAs QDs with high density of 1.3 × 1010 cm-2 are grown by using S-K growth method with fast growth rate. Using the two-step growth method, the InAs QDs size uniformity improves by 63% and 110% compared that of the dots grown by ordinary S-K method and ALE method, respectively. Narrow photoluminescence (PL) emission spectrum of the QDs grown by using the two-step growth method is received. FWHM of the PL curve is measured at 26 meV and the peak emission wavelength is larger than 2.3 μm at 77 K.

Original languageEnglish
Pages (from-to)s25-s28
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume16
Issue numberSUPPL.
DOIs
Publication statusPublished - Jun 2006
Externally publishedYes

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